Lock.



R. KADAR & I. 36TH.

LOOK;

APPLICATION FILED JULY 16, 1908.

9 1 4,423 Patented 'Mar. 9, 1909.

I 7. Mill i 3, I l

WITNESSES: M/ VE IV TORS 76164124 fla M ATEN RUDOLF KADAR AND IGNATZROTH, or NEW YORK, N. Y.

LOCK.

Specification of Letters Patent.

Patented March 9, 1909.

Application filed July 15, 1908. Serial No. 443,639.

To all whom it may concern:

Be it known that we, ltunoLr Kamila and l cNii'rz Ro'rn, subjects of theKing of Hungary, and residents of the city of New York, in the county ofNew York and State of New York, have invented certain new and usefulImprovements in Locks, of which the following is a specification.

The present invention relates to looks for securing doors and otherparts; and has for its object to combine in a lock of simpleconstruction means for preventing at will the insertion of a key fromthe outside for the purpose of opening the door; such means beingadapted to be set from the inside, whenever it may be necessary oradvisable to prevent the operation of the locking bolt of the lock fromthe outside.

The invention has also for its object to simplify and improve theelements or subcombinations of a lock of this character; and to theseends it consists in certain novel features of construction andarrangement, which will be hereinafter described and claimed.

The invention is illustrated in the accompanying drawings, in which"Figure 1 is a perspective view of a part of a door having the improvedlock attached thereto, Fig. 2 is a side elevation of the lock,-

Fig. 3 a side elevation of the lock, the cover plate being removed, andFig. 4is a sectional view of a detail of construction.

Referring to the drawings, 1 designates the door, which as representedis of the usual construction, provided with the usual escutcheon plates2, and a mortise lock 3, adapted to be operated by means of a key fromthe out-side and by means of the turn ing knobs 4 and 5 from the inside.The lock casing is indicated at 6 and its cover plate at 7, the latterbeing secured to the lock case by means ofscrews 8, 8. The casing may beformed from sheet metal or may be cast, and its front plate 9 isprovided with flanges 10, to receive the screws or fastening devices bymeans of which the lock is secured in operative position.

11 designates the locking bolt of the lock, which is of the usualconstruction, and controlled by a tumbler 12, under the tension of aspring 13, which latter rests also against the latch bolt 14, adapted tobe operated by the hub 14, having a square hole 15, which is engaged bythe square end of the spindle 16, carrying the turning knob 5. Nospecial description of the operation of these parts is necessary, sincetheir construction and arrangement are similar to the locks, heretoforein use, except that the latch 14 is provided with a projection 1.7 whichmay be engaged when pushed inwardly by the nose 18 of a lever 19,protruding through a hole 20 of the face plate 9 of the lock. The latchwill thus be kept in its retracted position thereby, in such a mannerthat it will be released when slightly pushing the latch 14 furtherinward, whereby the lever 19 will be disengaged by its own weight fromthe latch 14.

The locking bolt 11 is not operated in the usual manner by the keydirectly, but by means of an intermediary device between the key and thebolt. This device comprises a, preferably, cylindrical member 21,rotatably mounted in the lock case and pro vided with a projection 22which will opcrate the tumbler 12 and the locking bolt 11 when thecylindrical member 21 is turned in the proper direction. A key-hole 23is provided in this cylindrical member 21 for the insertion of a key.The cylindrical member is furthermore provided with a square hole 24,engaged by the square end of a spindle 25, carrying the turning knob 4.From the inside the locking bolt is operated by means of this turningknob 4 in a well known manner.

In the outer escutcheon plate 2 is rotatably mounted a disk 26,preferably provided with a dove-tailed periphery, fitting in theclove-tail of the escutcheon plate 2. The disk 26 is provided near toits periphery with a circular hole 27, while in the es cutcheon plate 2is arranged a trapeziform hole 28 in line with a similar hole 29 of thecover plate 7, which holes 27 and 28 constitute the key-hole of thelook. It is obvious that when the hole 27 of the disk 26 and the hole 28of the escutcheon plate 2 are brought to register, the key may beinserted, but will not operate the lock unless the keyhole 23 of thecylindrical member 21 coincides with the hole 29 of the cover plate 7.

The operation of the device is as follows: From the inside the lockingbolt may be operated by means of the turning knob 4, whereby theprojection 22 of the cylindrical member 21 lifts the tumbler and pushesthe locking bolt 11 forward. Should it be desired to prevent the openingof the door from the outside, the turning knob 4 is turned so that itskey-hole 23 does not coincide With the hole 29 of the cover plate 7.Obviously means may be provided for holding the cylindrical member 21 insuch a position, although it is not necessary. When the key-hole 23 doesnot coincide with the hole 29 of the cover plate, it Will be easily seenthat the key cannot beinserted into the lock far enough to operate thesame. This Will be possible only When the cylindrical member is broughtinto the proper position, Where it may be kept by means of a projection30 of the lock case engaging a recess 31 of the projection 22 of thecylindrical member 21. When the key is inserted, it will be moved Withthe cylindrical member 21 around the center of this member, and for thisreason the disk 26 is mounted rotatably in the escutcheon plate 2.

What We claim is:

1. In a lock, the combination With a casing having a hole in its coverplate, of a locking bolt slidably arranged in said casing, a cylindricalbody rotatably mounted in said casing for operating said locking 2:.

bolt and having a key-hole adapted to register with the hole in saidcasing or to be CQXI IBIGCl by the cover plate of said casing 'at W1 12. In a lock, the combination With a cas- 3 ing having a hole in itscover plate, of a locking bolt slidably arranged in said casing, acylindrical body rotatably mounted in said casing for operating saidlocking bolt and having a key-hole, and means for setting saidcylindrical body so that the key-hole thereof may register with the holeof said cover plate or may be covered by said cover plate at Will.

Signed at New York, in the county of 40 New York and State of New York,this. 29th day of June, A. D. 1908.

' RUDOLF KADAR.

IGNATZ ROTH.

Witnesses:

PETER BARDEN, Josmr LEADRERING.

